The Nakajima Sakae (栄, "glory") was a two-row, 14-cylinder air-cooled radial engine used in Japaneseaircraft during World War II. It was version of the famous Gnome-Rhône 14K, a license for which had been taken out in 1936. "Sakae" was the navy designation; the army called it the Ha-25 (ハ25). A total of 21,166 were made by Nakajima; 9,067 were manufactured by other firms. Nakajima Sakae engine, on display at the National Museum of Science, Tokyo. ... Nakajima Sakae engine, on display at the National Museum of Science, Tokyo. ... Categories: Stub | Japanese aircraft manufacturers | Aircraft engine manufacturers ... Radial engine of a biplane. ... An aircraft is any machine capable of atmospheric flight. ... World War II was a truly global conflict with many facets: immense human suffering, fierce indoctrination, and the use of new, extremely devastating weapons such as the atom bomb. ...
Specifications
Displacement : 27.9 liters
Bore and stroke : 130 × 150mm
Length : 1,425mm
Diameter : 1,115 mm
Models
Sakae 21 : 1,130 hp (840 kW)
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"It was version of the famous Gnome-Rhône 14K, a license for which had been taken out in 1936." (This statment is not true) The IJ Army designation of Ha25 applied to the first of the series. Later versions were designated Ha105, Ha115 and the Navy designations were Sakae 10, 20 and 30 series.
Nakajima thought these requirements to be completely unrealistic and pulled out of the competition on January 17, 1938.
In November 1941 the Nakajima Hikoki K.K. was instructed to begin producing the Model 21 at its Koizumi plant.
The Sakae 21 engine of the A6M3 had a higher fuel consumption rate than the Sakae 12, and this, acting in concert with the reduced fuel capacity resulting from the installation of the two-speed supercharger, had an adverse effect on range, which had been one of the strong points of the A6M2.
Nakajima's team thought the new requirements were ridiculous and pulled out of the competition in January.
In late 1941 Nakajima introduced the Sakae 21, which used a two speed supercharger for better altitude performance, and increased power to 1,130hp.
The new Sakae was slightly heavier and somewhat longer due to the larger supercharger, which moved the center of gravity too far forward on the existing airframe.
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